User's Manual

DVE
Futurecom Systems Group Inc. DVE Users Manual 8A084X03_Rev1_3.DOC Rev. Preliminary Page 7
2. INTRODUCTION
The Futurecom MOBEXCOM DVE® is designed to interface to a range of mobile radios and control heads. It
permits expanded operation of portable radios. The DVE system consists of a mobile radio, MOBEXCOM DVE®
unit and a mobile radio Control Head. The Control Head communicates with the DVE and the mobile using a
serial data protocol.
MODES
The DVE operates in one of two modes. The mode of operation is selectable from the Mobile Control Head
by the mobile radio operator.
The modes are known as the MOBILE (DVE OFF) and SYSTEM modes. The function and purpose of each
mode is described as follows.
Mobile Mode
In the MOBILE mode, the DVE is completely disabled. The mobile radio is operational and will permit the
mobile radio user to communicate conventionally, using the mobile radio. The mobile user may select the
desired mobile operating channel, adjust the receiver volume level and transmit using the microphone Push-
to-Talk (PTT).
This mode is used when DVE operation is not desired. The DVE System operates similarly to a standard
mobile radio system, as if the DVE were not present. The MOBILE mode should be selected if several DVE
equipped vehicles are in the same area and another DVE already has SYSTEM mode enabled.
System Mode
In the SYSTEM mode, both the Mobile Radio and the DVE are enabled to permit the full exchange of
communications among nearby portable radio users and the dispatcher and other users on the Mobile Radio
channel. Signals received by the DVE receiver are heard in the mobile speaker and will also be retransmitted
by the Mobile transmitters. Signals received by the Mobile receiver are heard in the mobile radio speaker and
are also retransmitted out of the DVE transmitter. However, all functions of the mobile radio operate normally,
except for scan, scan activation, mode selection, zone selection, home channel operation and mobile channel
selection. When the SYSTEM repeat mode is selected, the mobile radio scan is deactivated and the mobile
radio reverts to the selected mobile channel. When signals are present in both the DVE and Mobile receivers
simultaneously, the signal from the DVE will have priority in the mobile speaker. (Note that the receiver/PTT
and speaker priorities are programmable.)
The DVE receiver has full priority over the mobile radio operator microphone Push-to-Talk. The mobile
radio operator microphone Push-to-Talk has priority over the Mobile receiver.
When signals are present in both the DVE and Mobile receivers simultaneously, the signal from the DVE
has priority in the mobile speaker.
The SYSTEM repeat mode is used when full communications among all radio parties is desired.
CONTROL HEAD
The control unit is a standard mobile radio control head. The DVE is designed to operate with a variety of
control heads. It is a ruggedly constructed weatherized control unit, incorporating an array of pushbuttons, a
Liquid Crystal display, 2 knobs and 2 LED indicators. The display and pushbuttons are backlit for night time
visibility.
The control unit is housed in a two-piece plastic, weather-resistant housing. The external radio/DVE
connections are made to connector on the rear of the unit. A microphone is provided and is secured to the control
unit connector on the front of the control unit.
A serial-control data interface is used to provide a communications connection between the control unit, the
DVE and the mobile radio.
The following features are provided:
Knobs for
:
‘Volume’ with integral Power On/Off pushbutton switch
‘Channel’ selection
Pushbuttons for
: